Relationships in the settlement are tested by Adam's choice of Francesco Ceruso as crew for his fishing boat. A corrupt marine sergeant, John Logan, is determined to exploit the dissent in the settlement for his own evil ends.
One day, when Adam and Francesco are fog bound and becalmed, they just avoid a collision with HMS Intrepid, a frigate in the East Africa squadron on anti-slavery patrol. A chance meeting with the captain and crew has far reaching effects on Adam and Ruth's marriage and the lives of those around them.